20986040

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7187}}^1$

素因数の和:7271

約数の個数: 32

約数和(自身を含む): 47872080

約数和(自身を除く): 26886040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7187, 14374, 28748, 35935, 57496, 71870, 143740, 287480, 524651, 1049302, 2098604, 2623255, 4197208, 5246510, 10493020, 20986040]

約数ペア:

[(1, 20986040), (2, 10493020), (4, 5246510), (5, 4197208), (8, 2623255), (10, 2098604), (20, 1049302), (40, 524651), (73, 287480), (146, 143740), (292, 71870), (365, 57496), (584, 35935), (730, 28748), (1460, 14374), (2920, 7187)]